"Tony is our No. 1 quarterback," Jones said Sunday, per Todd Archer of ESPN.com.
Romo suffered a fracture in his back in August and hasn't played in the regular season. He was on the sidelines Sunday when Prescott directed the team to a straightforward 28-14 victory over the Cincinnati Bengals in a game Dallas led 28-0 in the fourth quarter.
The Mississippi State product finished 18-of-24 for 227 yards and a touchdown and also scored on the ground for the third time this year. Brad Evans of Yahoo Sports pointed to that rushing ability as one thing that will give Prescott the advantage if there is an actual decision when Romo returns:
Prescott hasn't just won, he's avoided crippling turnovers as a rookie. According to Archer, he is just eight passes shy of breaking Tom Brady's record of 163 attempts to start a career without an interception.
Jones didn't see two talented quarterbacks as a problem after his team's win Sunday, per Archer:
We're going to have the luxury of being able to, I think, see them both. Now I don't want to take anything -- presume that Dak is going to be necessarily healthy. I don't want to presume anything like that, but I welcome the opportunity of having Dak playing at this level and Tony back in excellent health. It's going to be really special for the Cowboys.
Archer noted the "target date" for Romo is Oct. 30 for a potentially critical NFC East showdown with the 3-1 Philadelphia Eagles. Romo is set to undergo an MRI on Monday, and Jones said he expects it will reveal the quarterback is healthy again.
From a resume standpoint, Romo is the clear choice. The four-time Pro Bowler is an established contributor at the NFL level with 34,154 passing yards and 247 touchdown throws in his career.
However, Prescott has impressed with at least 227 passing yards in all five games. He has also already matched last year's win total and developed into half of a dynamic backfield alongside rookie running back Ezekiel Elliott.
The Ohio State product leads the NFL with 546 rushing yards this season and has created a "pick your poison" scenario for opposing defenses. Elliott takes advantage of openings up the middle when safeties and linebackers shade toward receivers in pass coverage, and Prescott finds holes when opponents stuff the box to stop the rushing attack.
That will ideally continue from Dallas' perspective with Romo under center because Jones made it clear who will be taking snaps when both quarterbacks are healthy and active.